One vertex per element, one color per generator, with an edge from x to x·s.
(3,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,18,23,27)(19,24,28,30)(20,22,26,31)(21,25,29,32)(1,2,4,6)(3,5,7,8)(9,10,12,14)(11,13,16,15)(17,19,23,28)(18,24,27,30)(20,21,26,29)(22,25,31,32)(1,3)(2,5)(4,7)(6,8)(9,10,12,14)(11,13,16,15)(19,28)(21,29)(24,30)(25,32)(9,10,12,14)(11,15,16,13)(17,20)(18,22)(19,21)(23,26)(24,25)(27,31)(28,29)(30,32)(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,21)(18,25)(19,26)(20,28)(22,30)(23,29)(24,31)(27,32) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,11,12,16)(10,13,14,15)(17,22)(18,26)(19,25)(20,27)(21,30)(23,31)(24,29)(28,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.